Aspects of the extension of forty exploitation of bulk reservoirs for irrigation and hydropower purposes

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Aspects of the extension of forty exploitation of 
bulk reservoirs for irrigation and hydropower 
purposes
Dilshod Bazarov
1* 
, Bobur Shodiev
1 
, Boxodir Norkulov
2 
, Umida Kurbanova
2
 and Boyburi 
Ashirov
3
1
Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Waterpower exploitation 
and pumping stations, 100000, Tashkent, Kara-Niyaziy str, Uzbekistan. 
2
Samarkand State Architectural Building Institute, 140100, Samarkand, Lolazor str., Uzbekistan.
3
Karshi State Engineering and Economic Institute, 180100,
Karshi, Mustakillik 225
str., Uzbekistan. 
Abstract. The article is devoted to solving the problems of reducing the 
useful volume of bulk reservoirs, which is an urgent task of water 
management. The development of the design allows to reduce the volume 
of incoming sediment into the reservoir thicket is the main goal of the 
present work. The analysis of materials of field studies and a review of 
existing scientific works was the basis of the research method. The results 
of field studies on the study of channel processes in the downstream of the 
feeder channel of a low-pressure reservoir and the dynamics of their 
siltation. It has been established that the reservoirs accumulate only 0.3-10% 
of the annual river flow and the degree of annual silting of the capacity of 
such reservoirs is on average 0.5-2.0%. After 25-50 years, reservoirs may 
lose half of their usable capacity and after 40-80 years, a complete failure 
of operation is possible. To slow down this process in the basins of the 
self-leveling reservoirs, a new structure of structures developed, which 
ensures an even flow of water in the supply channel and maximum 
sedimentation of sediments in the channel, which prevents them from 
entering the reservoir bowl.